Date   

Re: Tektronix 575 help

Adrian
 

Hi David,

RS, Rapid, FEC all stock it in 0.25kg reels @ ~40 quid. If by a 'small' amount you mean a dozen feet or so for a specific job and 36/62/2 Pb/Sn/Ag 0.7mm 5 core 362 works for you then PM me a UK postal address and I gladly pop some in the post FOC. Temp is ~179C I think.

Adrian

On 1/24/2019 9:11 PM, David Slipper wrote:
Good advice, but can anyone suggest where to get a small quantity in the
UK ???

xBay seems to have either lead free or silver free Tin-Lead 60/40

On 12/01/2019 18:33, toby@telegraphics.com.au wrote:
silver bearing tin-lead rosin cored solder


Re: 2205: Channel 1 problem

steve
 

UPDATE: Upon closer inspection, I have two out-of-spec voltages on U30. Also, I noticed two bodged diodes across pins 2 and 3 of U30 (and comparable U80 on Ch. 2). These are from a manual change M67537 indicating the addition of these diodes A2CR14 and A2CR64. But, on my scope they are installed backwards from the indicated manual diagram. So I removed them, checked them on a diode checker, and reinstalled as indicated in the manual. No change in Ch. 1 problem. The voltages on pins 2 and 3 are still out of spec as follows:

A2U30 pin 2 should be 0v. I measure +0.52v
A2U30 pin 3 should be -0.8v. I measure -0.28v.

The voltage difference between pins 2 and 3 is the same (0.8v) but is 0.52v high.

The +8.6 and -8.6 supply voltages around this circuit all look good.


Re: 2467B Trace flicker

Chuck Harris <cfharris@...>
 

One of the biggest gotcha's for new users of high bandwidth
scopes is noise. They look at it in the fuzziness of the
trace and assume that the scope manufacturer blew the design.
"My 400MHz bandwidth 2465B just isn't as sharp as my 50MHz
547," they say, while muttering to themselves that they just
can't get good quality anymore.

They see noise dancing on the signals they measure, and assume
it is all real and fatally harmful.

Digital circuitry from the 80's and 90's is rife with noise
emitters, as the FCC regulations of such emitters were fairly
new back then. Class A and Class B designations in Part 15 had
just come out in an attempt to recapture the RF spectrum from
digital devices.

Designers for years ignored circuit board layout, and applied
mitigation techniques involving shielded cases, RF gaskets,
filtered power cords, and tons and tons of bypass capacitors
as their principle methods of reducing emissions... Oh, and
mustn't forget ferrite beads and bracelets.

Modern day designers ignore the cases, and use transmission
lines for all signals, local shields over naughty places on
the board, ground planes, controlled rise times, and lower
voltage signaling to mitigate emissions. It is a lot easier
to control noise when you don't make it in the first place.

For a scope measurement to have any sense of fidelity in such
a noise ridden environment, the grounding connection needs to
be right at the probe tip, not 6 inches of wire away from the
probe tip. The grounding wire/clip that newbies commonly use
without a thought, is an excellent antenna for HF signals,
and a very poor "ground" for fast digital signals.

You cannot believe anything you see above about 10MHz on a
2465B scope using the stock probes and their 6 inch ground
wires.

Also, it is normal for 2465B scopes to have intensity
flickering in the main trace at some sweep speeds, display
modes, multiple trace settings, and settings of the
trigger. The display is highly multiplexed, and the beam
intensity is under the control of an overtaxed 6802 MPU.

There is a lot more going on in a 2465 than there is in a 547.

Do the next guy that owns your scope a favor and put away
your soldering iron. If you don't know why a part should be
replaced, you might want to think about it some more.

-Chuck Harris

thespin@gmail.com wrote:

I've sorta scattershot replaced the S/H opamp U2630B and the muxes U2530 and U2501, after testing the surrounding passives. No change. I see no "walking" of the flicker for various sweep speeds.

On Mon, Jan 21, 2019 at 01:02 PM, machineguy59 wrote:


In a previous post you described noise on the DIA signal and high frequency
noise on the DI signal. You have to quiet that noise before any other
intensity measurements can be meaningful. If DIA in noise free you can check
the Z-axis by putting a test scope on The Z-Axis outputs (test points 65 and
66 in the service manual). The Display sequencer and a few other parts CAN
give you screen flicker but they don't put noise on DIA and they usually


Re: 2467B Trace flicker

 

My last message was too brief.  I meant to speak of DI (Display Intensity) on both sides of R2702.  It would be most miraculous if you could fix this one with shotgun replacement techniques.  You will need to diagnose the character of the display intensity command and make it stable before display intensity will be stable.

On ‎Friday‎, ‎January‎ ‎25‎, ‎2019‎ ‎07‎:‎15‎:‎25‎ ‎AM‎ ‎CST, machineguy59 via Groups.Io <machineguy59=yahoo.com@groups.io> wrote:

Is DIA still noisy?  Can you discern anything about that noise character?  Can you put a capacitor on it to ground and quiet the noise?
    On ‎Friday‎, ‎January‎ ‎25‎, ‎2019‎ ‎07‎:‎05‎:‎12‎ ‎AM‎ ‎CST, thespin@gmail.com <thespin@gmail.com> wrote:

I've sorta scattershot replaced the S/H opamp U2630B and the muxes U2530 and U2501, after testing the surrounding passives. No change. I see no "walking" of the flicker for various sweep speeds.

On Mon, Jan 21, 2019 at 01:02 PM, machineguy59 wrote:


  In a previous post you described noise on the DIA signal and high frequency
noise on the DI signal.  You have to quiet that noise before any other
intensity measurements can be meaningful.  If DIA in noise free you can check
the Z-axis by putting a test scope on The Z-Axis outputs (test points 65 and
66 in the service manual).  The Display sequencer and a few other parts CAN
give you screen flicker but they don't put noise on DIA and they usually
present other problems too.  So, if DIA is quiet, and test points 65 and 66
show proper waveforms with little noise in their amplitude, try other sweep
speeds and see if the flicker "walks" across the screen.  
Step 1:  Obtain clean, noise free DIA signal.
    On ‎Monday‎, ‎January‎ ‎21‎, ‎2019‎
‎09‎:‎53‎:‎36‎ ‎AM‎ ‎CST, thespin@gmail.com
<thespin@gmail.com> wrote:

  Is there a good way to trace whether it's the z-axis hybrid, the display
sequencer, or the front panel DAC subsystem?

On Fri, Jan 18, 2019 at 12:02 PM, victor.silva wrote:


Issues like you describe are usually related to a display sequencer (U650).
In my opinion I believe this is selected part.  I see many 2465Bs with the
display sequencer chip with a green thick magic marker line on it.
2445Bs do not normally have that mark on them.

--Victor


Re: 2467B Trace flicker

 

Is DIA still noisy?  Can you discern anything about that noise character?  Can you put a capacitor on it to ground and quiet the noise?

On ‎Friday‎, ‎January‎ ‎25‎, ‎2019‎ ‎07‎:‎05‎:‎12‎ ‎AM‎ ‎CST, thespin@gmail.com <thespin@gmail.com> wrote:

I've sorta scattershot replaced the S/H opamp U2630B and the muxes U2530 and U2501, after testing the surrounding passives. No change. I see no "walking" of the flicker for various sweep speeds.

On Mon, Jan 21, 2019 at 01:02 PM, machineguy59 wrote:


  In a previous post you described noise on the DIA signal and high frequency
noise on the DI signal.  You have to quiet that noise before any other
intensity measurements can be meaningful.  If DIA in noise free you can check
the Z-axis by putting a test scope on The Z-Axis outputs (test points 65 and
66 in the service manual).  The Display sequencer and a few other parts CAN
give you screen flicker but they don't put noise on DIA and they usually
present other problems too.  So, if DIA is quiet, and test points 65 and 66
show proper waveforms with little noise in their amplitude, try other sweep
speeds and see if the flicker "walks" across the screen.  
Step 1:  Obtain clean, noise free DIA signal.
    On ‎Monday‎, ‎January‎ ‎21‎, ‎2019‎
‎09‎:‎53‎:‎36‎ ‎AM‎ ‎CST, thespin@gmail.com
<thespin@gmail.com> wrote:

  Is there a good way to trace whether it's the z-axis hybrid, the display
sequencer, or the front panel DAC subsystem?

On Fri, Jan 18, 2019 at 12:02 PM, victor.silva wrote:


Issues like you describe are usually related to a display sequencer (U650).
In my opinion I believe this is selected part.  I see many 2465Bs with the
display sequencer chip with a green thick magic marker line on it.
2445Bs do not normally have that mark on them.

--Victor


Re: 2467B Trace flicker

thespin@...
 

I've sorta scattershot replaced the S/H opamp U2630B and the muxes U2530 and U2501, after testing the surrounding passives. No change. I see no "walking" of the flicker for various sweep speeds.

On Mon, Jan 21, 2019 at 01:02 PM, machineguy59 wrote:


In a previous post you described noise on the DIA signal and high frequency
noise on the DI signal.  You have to quiet that noise before any other
intensity measurements can be meaningful.  If DIA in noise free you can check
the Z-axis by putting a test scope on The Z-Axis outputs (test points 65 and
66 in the service manual).  The Display sequencer and a few other parts CAN
give you screen flicker but they don't put noise on DIA and they usually
present other problems too.  So, if DIA is quiet, and test points 65 and 66
show proper waveforms with little noise in their amplitude, try other sweep
speeds and see if the flicker "walks" across the screen.  
Step 1:  Obtain clean, noise free DIA signal.
On ‎Monday‎, ‎January‎ ‎21‎, ‎2019‎
‎09‎:‎53‎:‎36‎ ‎AM‎ ‎CST, thespin@gmail.com
<thespin@gmail.com> wrote:

Is there a good way to trace whether it's the z-axis hybrid, the display
sequencer, or the front panel DAC subsystem?

On Fri, Jan 18, 2019 at 12:02 PM, victor.silva wrote:


Issues like you describe are usually related to a display sequencer (U650).
In my opinion I believe this is selected part.  I see many 2465Bs with the
display sequencer chip with a green thick magic marker line on it.
2445Bs do not normally have that mark on them.

--Victor


Re: Tektronix 575 help

 

MP of that will be rather high compared to 60/36/4 Pb/Sn/Ag

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Glenn
Little
Sent: 24 January 2019 23:24
To: TekScopes@groups.io
Subject: Re: [TekScopes] Tektronix 575 help

A quick search shows Parts Express has 96% Sn/ 4% Ag solder.
The cost is $44.75 for 1/2 pound.
MSDS shows melting point is 183C the same a Eutectic solder.
Looks suspicious to me as this is made in Tiawan.

This high of Ag content can cause crystallization problems.

Glenn


Re: Tektronix 575 help

Craig Sawyers <c.sawyers@...>
 

Farnell RS ETC
Craig


Sent from my Samsung Galaxy smartphone.

-------- Original message --------From: David Slipper <softfoot@hotmail.com> Date: 25/01/2019 08:11 (GMT+10:00) To: TekScopes@groups.io Subject: Re: [TekScopes] Tektronix 575 help

Good advice, but can anyone suggest where to get a small quantity in the
UK ???

xBay seems to have either lead free or silver free Tin-Lead 60/40

On 12/01/2019 18:33, toby@telegraphics.com.au wrote:
silver bearing tin-lead rosin cored solder


Re: 465 minor repairs - help requested

guy.r.thomas
 

There is an album with pictures in the Photos section 465B Front and Rear BNCs


Re: Tektronix Neon Light replacement parts?

Cliff Carrie
 

The wires through the glass of a neon lamp are made of Kovar, an iron-nickel-cobalt alloy with a coefficient of thermal expansion similar to that of hard (borosilicate) glass. Kovar is more brittle than copper and may be made more so by the glass processing temperatures. Also, copper connecting wires may be welded to the Kovar leads very close to the glass, all making this a weak area where stress and flexing should be avoided.

You really need to look at the parts list and wiring diagrams for each neon you replace. Tek used them for many purposes besides indicators. You will find neon voltage clamps in scope CRT circuits. They have been used as protection clamps on timebase trigger inputs. Many of these light up only briefly if at all, and will last a long time. Neons left on continuously will age badly. We have all seen power bars with a flickering or dead neon. As they age, the strike voltage and the extinguishing voltage rise very significantly. I have confirmed this with my 7CT1N curve tracer. I have tested photosensitivity; the strike voltage drops by a few volts with bright illumination. Isotope filled neons are supposed to be less photosensitive. There was an NE2-looking voltage regulator in the 3B3 timebase delay circuit (the Philips ZZ1000, about twice as long as an NE-2 and blackened on the inside). Even more exotic was the NE77, a three electrode device that behaves a bit like a thyristor, but I never saw it in Tek gear. I have about 12 pages of 1962 vintage GE catalog information on these and other glow lamps if anyone is interested.

Cliff Carrie
________________________________


Re: Tek 555 Dual Beam power supply cable/connectors

Matt Russell
 

probably a pipe dream but I am a new 555 owner and new to the group. I would be very happy to take a cable or two off your hands if you by chance still have on and the desire to sell. thank you, Matt


Anyone have a Tek 555 interconnection cable for sale

Matt Russell
 

I just purchased a 555. It has had someone poking around that shouldn't have been! Not that I am the best candidate either!! However, I am in need of either the interconnection cable in whole, or some of the ends with the clasps, I am having trouble sourcing these, and I am starting to think about all of the horrible things I could do to defile this amazing piece of equipment, any help would be very much appreciated by myself and my 555! thank you all.-Matt


Re: Tektronix 575 help

John Griessen
 

On 1/24/19 9:50 PM, Dan Cordova via Groups.Io wrote:
On 1/24/2019 8:35 PM, Dave Seiter wrote:
  The only "shelf life" limit would be from a change to the rosin, or more likely, surface corrosion.
I agree. I bought a big 4lb roll of rosin core 60/40 about 14 gauge thick with really old
looking markings at the thrift store fifteen years ago -- older than the 60's.
Works great for sheet metal soldering with big irons.


Re: Tektronix 575 help

Dan Cordova <danny_cordov@...>
 

Before the internet, cell phones, fax machines and all those convenient and modern devices, NATTC (Naval Air Technical Training Center) taught sailors and marines how to fix gear with a schematic and troubleshooting techniques. We couldn't call, email or go on the internet because we didn't have it. 
Don't get me wrong, I don't want to go back to those days...

On Thursday, January 24, 2019, 7:42:42 PM PST, Glenn Little <glennmaillist@bellsouth.net> wrote:

In soldering class while in the Navy, we were taught that solder was to
cleaned with alcohol before use. We would take a gauze pad and get it
wet from the alcohol pump bottle on the bench and pull a length of
solder through the gauze. This would clean the surface contaminants off
of the solder.

It must work because the gauze got black where we pulled the solder
through. Probably a little less for the flux to clean.

Glenn

On 1/24/2019 8:35 PM, Dave Seiter wrote:
  The only "shelf life" limit would be from a change to the rosin, or more likely, surface corrosion.  I've used plenty of solder from the spools Tek put into the ceramic-strip era equipment, (some really nasty looking) and it always works.  Sounds like scare tactics from Kester and others who could claim that old solder wasn't "reliable".  OTOH, maybe newer Pb-free solders w/rosin are more sensitive, but I doubt it.
-Dave
      On Thursday, January 24, 2019, 4:59:12 PM PST, Jim Ford <james.ford@cox.net> wrote:
 
  Supposedly solder (and other things) has a shelf life.  Can't use it on deliverables at work so they throw it out.  I have several spools at home from Raytheon my employer.
Jim Ford


Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message --------From: Glenn Little <glennmaillist@bellsouth.net> Date: 1/24/19  2:49 PM  (GMT-08:00) To: TekScopes@groups.io Subject: Re: [TekScopes] Tektronix 575 help
I get mine at ham fests.
Seems like there are some thinking hams that get the lead bearing scrap
relieving the company they work for from the legal hassles of disposing
of lead bearing solder and bring it to the ham fests. And the price is
reasonable. The last full roll that I bought was about $3.00 USD.

Glenn

On 1/24/2019 4:36 PM, Dave Wise wrote:
Kester 83-7145-0415 .  About $10 at Amazon.  They ship to UK, right?  More generally, search for <solder> <62> <36> <2>.

HTH,
Dave
________________________________________
From: TekScopes@groups.io <TekScopes@groups.io> on behalf of David Slipper <softfoot@hotmail.com>
Sent: Thursday, January 24, 2019 1:11 PM
To: TekScopes@groups.io
Subject: Re: [TekScopes] Tektronix 575 help

Good advice, but can anyone suggest where to get a small quantity in the
UK ???

xBay seems to have either lead free or silver free Tin-Lead 60/40

On 12/01/2019 18:33, toby@telegraphics.com.au wrote:
silver bearing tin-lead rosin cored solder




--
-----------------------------------------------------------------------
Glenn Little                ARRL Technical Specialist  QCWA  LM 28417
Amateur Callsign:  WB4UIV            wb4uiv@arrl.net    AMSAT LM 2178
QTH:  Goose Creek, SC USA (EM92xx)  USSVI LM  NRA LM  SBE ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"


Re: Tektronix 575 help

Glenn Little
 

In soldering class while in the Navy, we were taught that solder was to cleaned with alcohol before use. We would take a gauze pad and get it wet from the alcohol pump bottle on the bench and pull a length of solder through the gauze. This would clean the surface contaminants off of the solder.

It must work because the gauze got black where we pulled the solder through. Probably a little less for the flux to clean.

Glenn

On 1/24/2019 8:35 PM, Dave Seiter wrote:
The only "shelf life" limit would be from a change to the rosin, or more likely, surface corrosion.  I've used plenty of solder from the spools Tek put into the ceramic-strip era equipment, (some really nasty looking) and it always works.  Sounds like scare tactics from Kester and others who could claim that old solder wasn't "reliable".  OTOH, maybe newer Pb-free solders w/rosin are more sensitive, but I doubt it.
-Dave
On Thursday, January 24, 2019, 4:59:12 PM PST, Jim Ford <james.ford@cox.net> wrote:
Supposedly solder (and other things) has a shelf life.  Can't use it on deliverables at work so they throw it out.  I have several spools at home from Raytheon my employer.
Jim Ford


Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message --------From: Glenn Little <glennmaillist@bellsouth.net> Date: 1/24/19  2:49 PM  (GMT-08:00) To: TekScopes@groups.io Subject: Re: [TekScopes] Tektronix 575 help
I get mine at ham fests.
Seems like there are some thinking hams that get the lead bearing scrap
relieving the company they work for from the legal hassles of disposing
of lead bearing solder and bring it to the ham fests. And the price is
reasonable. The last full roll that I bought was about $3.00 USD.

Glenn

On 1/24/2019 4:36 PM, Dave Wise wrote:
Kester 83-7145-0415 .  About $10 at Amazon.  They ship to UK, right?  More generally, search for <solder> <62> <36> <2>.

HTH,
Dave
________________________________________
From: TekScopes@groups.io <TekScopes@groups.io> on behalf of David Slipper <softfoot@hotmail.com>
Sent: Thursday, January 24, 2019 1:11 PM
To: TekScopes@groups.io
Subject: Re: [TekScopes] Tektronix 575 help

Good advice, but can anyone suggest where to get a small quantity in the
UK ???

xBay seems to have either lead free or silver free Tin-Lead 60/40

On 12/01/2019 18:33, toby@telegraphics.com.au wrote:
silver bearing tin-lead rosin cored solder




--
-----------------------------------------------------------------------
Glenn Little ARRL Technical Specialist QCWA LM 28417
Amateur Callsign: WB4UIV wb4uiv@arrl.net AMSAT LM 2178
QTH: Goose Creek, SC USA (EM92xx) USSVI LM NRA LM SBE ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"


Re: Tektronix 575 help

EricJ
 

I think it's the flux core that has a shelf life. I found a few 20+ year old rolls of Kester that seem to work just fine though. I can understand not using it in a business though.
--Eric
Sent from my Samsung Galaxy smartphone.

-------- Original message --------From: Jim Ford <james.ford@cox.net> Date: 1/24/19 6:58 PM (GMT-06:00) To: TekScopes@groups.io Subject: Re: [TekScopes] Tektronix 575 help
Supposedly solder (and other things) has a shelf life.  Can't use it on deliverables at work so they throw it out.  I have several spools at home from Raytheon my employer. 
Jim Ford 


Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message --------From: Glenn Little <glennmaillist@bellsouth.net> Date: 1/24/19  2:49 PM  (GMT-08:00) To: TekScopes@groups.io Subject: Re: [TekScopes] Tektronix 575 help
I get mine at ham fests.
Seems like there are some thinking hams that get the lead bearing scrap
relieving the company they work for from the legal hassles of disposing
of lead bearing solder and bring it to the ham fests. And the price is
reasonable. The last full roll that I bought was about $3.00 USD.

Glenn

On 1/24/2019 4:36 PM, Dave Wise wrote:
Kester 83-7145-0415 .  About $10 at Amazon.  They ship to UK, right?  More generally, search for <solder> <62> <36> <2>.

HTH,
Dave
________________________________________
From: TekScopes@groups.io <TekScopes@groups.io> on behalf of David Slipper <softfoot@hotmail.com>
Sent: Thursday, January 24, 2019 1:11 PM
To: TekScopes@groups.io
Subject: Re: [TekScopes] Tektronix 575 help

Good advice, but can anyone suggest where to get a small quantity in the
UK ???

xBay seems to have either lead free or silver free Tin-Lead 60/40

On 12/01/2019 18:33, toby@telegraphics.com.au wrote:
silver bearing tin-lead rosin cored solder





--
-----------------------------------------------------------------------
Glenn Little                ARRL Technical Specialist   QCWA  LM 28417
Amateur Callsign:  WB4UIV            wb4uiv@arrl.net    AMSAT LM 2178
QTH:  Goose Creek, SC USA (EM92xx)  USSVI LM   NRA LM   SBE ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"


Re: SG 504 leveling head

 

Hi Ancel,
Please, in the future, take your communications with customers off line. In your announcements, such as the one you just made about having two more heads for sale please specify in capital letters that interested parties contact you OFF LINE to keep your business posts off the forum. See my post from earlier today.

Thanks, Dennis Tillman W7PF

-----Original Message-----
From: Dennis Tillman W7PF
Sent: Thursday, January 24, 2019 2:50 PM
Subject: [TekScopes] Selling and buying common sense

Suggestion for anyone offering something for sale or trade:
It goes without saying that offers and purchases should always be handled off
line.

Please include in your post that interested parties should contact you off
line and include your email address.
For members interested in something that has been offered contact the sell
off line whether he says to do that or not. We don't need to know you
purchased something that was offered for sale.

Seller: when no more of the item or items are available let the group know so
nobody spends more time on it than necessary.

This will help in a small way to keep the noise level down.

Thank you,
Dennis Tillman W7PF
-----Original Message-----
From: Ancel
Sent: Thursday, January 24, 2019 5:51 PM
Subject: Re: [TekScopes] SG 504 leveling head- original

BTW guys I have 2 original leveling heads that are good.
Asking $140 shipped.
One is spoken for already.
-----Original Message-----
From: Ancel
Sent: Thursday, January 24, 2019 5:49 PM
Subject: Re: [TekScopes] SG 504 leveling head

Thx Jim....is the New leveling head with a BNC out ok? If u want an SMA out
I'll have to ship next week instead of this Friday.



--
Dennis Tillman W7PF
TekScopes Moderator


Re: SG 504 leveling head- original

 

BTW guys I have 2 original leveling heads that are good.
Asking $140 shipped.
One is spoken for already.


Re: SG 504 leveling head

 

Thx Jim....is the New leveling head with a BNC out ok? If u want an SMA out I'll have to ship next week instead of this Friday.


Re: Tektronix 575 help

Dave Seiter
 

The only "shelf life" limit would be from a change to the rosin, or more likely, surface corrosion.  I've used plenty of solder from the spools Tek put into the ceramic-strip era equipment, (some really nasty looking) and it always works.  Sounds like scare tactics from Kester and others who could claim that old solder wasn't "reliable".  OTOH, maybe newer Pb-free solders w/rosin are more sensitive, but I doubt it.
-Dave

On Thursday, January 24, 2019, 4:59:12 PM PST, Jim Ford <james.ford@cox.net> wrote:

Supposedly solder (and other things) has a shelf life.  Can't use it on deliverables at work so they throw it out.  I have several spools at home from Raytheon my employer. 
Jim Ford 


Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message --------From: Glenn Little <glennmaillist@bellsouth.net> Date: 1/24/19  2:49 PM  (GMT-08:00) To: TekScopes@groups.io Subject: Re: [TekScopes] Tektronix 575 help
I get mine at ham fests.
Seems like there are some thinking hams that get the lead bearing scrap
relieving the company they work for from the legal hassles of disposing
of lead bearing solder and bring it to the ham fests. And the price is
reasonable. The last full roll that I bought was about $3.00 USD.

Glenn

On 1/24/2019 4:36 PM, Dave Wise wrote:
Kester 83-7145-0415 .  About $10 at Amazon.  They ship to UK, right?  More generally, search for <solder> <62> <36> <2>.

HTH,
Dave
________________________________________
From: TekScopes@groups.io <TekScopes@groups.io> on behalf of David Slipper <softfoot@hotmail.com>
Sent: Thursday, January 24, 2019 1:11 PM
To: TekScopes@groups.io
Subject: Re: [TekScopes] Tektronix 575 help

Good advice, but can anyone suggest where to get a small quantity in the
UK ???

xBay seems to have either lead free or silver free Tin-Lead 60/40

On 12/01/2019 18:33, toby@telegraphics.com.au wrote:
silver bearing tin-lead rosin cored solder





--
-----------------------------------------------------------------------
Glenn Little                ARRL Technical Specialist   QCWA  LM 28417
Amateur Callsign:  WB4UIV            wb4uiv@arrl.net    AMSAT LM 2178
QTH:  Goose Creek, SC USA (EM92xx)  USSVI LM   NRA LM   SBE ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"

30881 - 30900 of 184750